A motor drive controller is provided that includes a current source inverter. The current source inverter includes driver circuitry configured to generate switching commands; a variable current source configured to generate a variable current that regulates power in a motor; and motor commutation circuitry configured to receive the variable current and switching commands, and to commutate phase currents that are output to the motor.

Disclosed is a cleaner comprising a cleaner body, a handle provided in the cleaner body, a wheel provided in a lower portion of the cleaner body and rotatably supporting the cleaner body, a motor driving the wheel electrically, an encoder sensing the rotation number of the wheel or the motor, and a controller controlling the driving of the motor by varying the voltage applied to the motor based on the rotation number sensed by the encoder, wherein the controller electrically drives the wheel by applying voltage to the motor when the velocity of the cleaner body initially moving is a preset value or more, and a controlling method for the cleaner.

A low-voltage motor is provided that includes a rotor and a stator having two or more phase windings and a number of single-turn coils. Each phase winding comprises a plurality of the single-turn coils connected together. Each of the single-turn coils is a single conductive loop that includes only one conductor on each side of the single-turn coil.

Embodiments of the present disclosure relate to an electric motor drive system for driving a low-voltage motor. The low-voltage motor includes a rotor and a stator that comprises a number of single-turn coils. A motor drive controller can control the low-voltage motor. The motor drive controller includes a current source inverter. The current source inverter includes driver circuitry configured to generate switching commands, a variable current source and motor commutation circuitry. The variable current source can generate a variable current that regulates power in the low-voltage motor. The motor commutation circuitry receives the variable current and switching commands, and commutates phase currents that are output to the low-voltage motor.

Disclosed is a cleaner comprising a cleaner body, a handle provided in the cleaner body, a wheel provided in a lower portion of the cleaner body and rotatably supporting the cleaner body, a motor driving the wheel electrically, an encoder sensing the rotation number of the wheel or the motor, and a controller controlling the driving of the motor by varying the voltage applied to the motor based on the rotation number sensed by the encoder, wherein the controller electrically drives the wheel by applying voltage to the motor when the velocity of the cleaner body initially moving is a preset value or more, and a controlling method for the cleaner.

Embodiments of the present disclosure relate to an electric motor drive system for driving a low-voltage motor. The low-voltage motor includes a rotor and a stator that comprises a number of single-turn coils. A motor drive controller can control the low-voltage motor. The motor drive controller includes a current source inverter. The current source inverter includes driver circuitry configured to generate switching commands, a variable current source and motor commutation circuitry. The variable current source can generate a variable current that regulates power in the low-voltage motor. The motor commutation circuitry receives the variable current and switching commands, and commutates phase currents that are output to the low-voltage motor.